RESUMEN
This study was done to find out the prevalence of respiratory and dermatological disorders among workers exposed to textile dyes and to investigate the dyes most probably associated with respiratory and dermatological disorders among exposed workers. It was carried out on 200 workers in dye houses in the textile dyeing industry in Al-Mahalla Al-Koubra as a study group and 200 workers not exposed to dyes as a control group. The results of this study revealed that: there was no statistically significant difference between both groups as regards age. marital status, residence, social class and educational level. The prevalence of smoking in both groups was almost the same with no significant difference. Inquiry about chronic cough, chronic phlegm and chronic bronchitis showed high prevalence rates in both groups but there were no significant differences between them. On the other hand, chest tightness, dyspnea, asthma and conjunctivitis were found to be significantly higher among the exposed group than among the non exposed group. In the present work, the longer duration of work exposure was found to be related to higher prevalence rate of respiratory and irritant symptoms, the difference between the groups was significant. Regarding the relationship between smoking habit and the prevalence rate of chronic respiratory symptoms, the current study demonstrated that there was significant difference between the three groups of exposed workers [smokers, non- smokers, ex-smokers], as regards chronic cough, chronic phlegm, chronic bronchitis and asthma. On studying the ventilatory functions, significant differences between exposed and non exposed groups of workers were found in the mean values of FVC% predicted, FEV1% predicted. FEV1/FVC% and FEF 25-75% predicted. Further more, these parameters were significantly lower among smokers and when the duration of dye exposure was prolonged. Multiple regression analysis was done to prioritize the factors affecting the ventilatory function parameters among the exposed workers and it revealed that, although the exposure to dye had a powerfull effect, yet smoking [number of cigarettes smoked per day and duration of smoking] had the strongest effect. Eczema was observed among 10% of the exposed group, while no cases of eczema were detected among the control group. About 86% [18 workers] of the workers having eczema gave positive reactions to the dye allergens. The prevalence of positive patch test reaction was found to be higher to disperse dye than to the reactive dye in the current study. This study proves that textile dyeing workers suffer from high prevalence of respiratory and dermatological disorders and the prevalence of positive patch test reaction was found to be higher to disperse dye than to the reactive dye